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ND90-4 3-1/2" Aluminum Cone Full-Range Driver 4 Ohm
Quick Overview
Dayton Audios compact aluminum cone drivers demonstrate the latest advances in high-excursion design processes.Product Highlights
- Full-range 80 Hz to 15 kHz performance
- Rubber-edged aluminum alloy cone
- Large excursion capability 4 mm Xmax, 20 mm peak
- Self-shielded Neo-Balanced motor structure
- 3/4" 4-layer underhung voice coil with polyimide former
- 20 watts RMS power handling
Product Manuals / Spec Sheets / Downloads
Dayton Audio ND90-4 Specification SheetDayton Audio ND90-4 Klippel Test Results
Dayton Audio ND90-4 Data Files
Buying Options
Dayton Audios compact aluminum cone drivers demonstrate the latest advances in high-excursion design processes. An efficient, low-distortion Neo-Balanced motor is combined with a rigid yet lightweight aluminum diaphragm, yielding impressive high-impact audio reproduction. Perfect for single point-source applications, or combined in multiples and line arrays.
OPTIMUM CABINET SIZE *
Sealed Volume 0.1 ft.³
Sealed F3 90 Hz
Vented Volume 0.16 ft.³
Vented F3 48 Hz
* Enclosure volume/F3s based on BassBox "optimum" calculations
| Speaker Series | ND Series |
| Model Number | ND90-4 |
| Color | Black |
| Unit of Measure | Each |
| UPC | 844632081064 |
| Warranty - Parts | 5 Years |
| Warranty - Labor | 5 Years |
| Product Shipping Weight (lbs.) | 0.55 |
| Speaker Type | Full-Range |
| Nominal Diameter | 3.50" |
| Power Handling (RMS) | 20 watts |
| Power Handling (max) | 40 watts |
| Continuous Program Power | -- |
| Impedance | 4 ohms |
| Sensitivity | 85.7 dB @ 2.83V/1m |
| Frequency Response | 80 - 15,000 Hz |
| Voice Coil Diameter | 19 mm |
| Magnet Weight | -- |
| DC Resistance (Re) | 3.6 ohms |
| Voice Coil Inductance (Le) | 0.62 mH @ 1 kHz |
| Resonant Frequency (Fs) | 90.2 Hz |
| Mechanical Q (Qms) | 5.1 |
| Electromagnetic Q (Qes) | 0.72 |
| Total Q (Qts) | 0.63 |
| Diaphragm Mass Inc. Airload (Mms) | 4.3g |
| Moving Mass Of Diaphragm (Mmd) | -- |
| Mechanical Compliance of Suspension (Cms) | 0.73 mm/N |
| Surface Area Of Cone (Sd) | 31.2 cm² |
| Volume of Displacement (Vd) | 12.5 cm³ |
| BL Product (BL) | 3.47 Tm |
| Compliance Equivalent Volume (Vas) | 1.06 liters |
| Maximum Linear Excursion (Xmax) | 4.0 mm |
| Drivers Mechanical Losses (Rms) | -- |
| Cone / Diaphragm Material | Black Anodized Aluminum Cone |
| Entry / Exit Diameter | -- |
| Surround Material | Rubber |
| Voice Coil Wire Material | Copper |
| Voice Coil Former | Kapton® / Polyimide |
| Basket/Frame Material | Steel |
| Magnet Material | Neodymium |
| Overall Outside Diameter | 103.5 mm |
| Overall Depth | 60.8 mm |
| Baffle Cutout Diameter | 85 mm |
| # Mounting Holes | 4 |
| Mounting Hole Diameter | -- |
| Bolt Circle Diameter | -- |
| Product Weight | -- |